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Q.

Carnot engine takes in 3000 k cal of heat from a reservoir at 627°C and gives it to a sink at 27°C. The work done by the engine is:

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a

4.2 X 106 J

b

8.4 x 106 J

c

16. 8 X 106 J

d

zero

answer is B.

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Detailed Solution

η=1-T2T1=WQ1 ⇒        W=Q11-T1T2=30001-300900                   =2000 kcal=8.4×106J
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